Osmoxylon lineare
Green Aralia
Osmunda regalis
Royal Fern
Oxalis acetosella
Wood-sorrel
Oxalis articulata
Pink-sorrel
Oxalis incarnata
Pale Pink-sorrel
Oxybasis glauca
Oak-leaved Goosefoot
Oxybasis rubra
Red Goosefoot
Pachira glabra
French Peanut
Palhinhaea cernua
Staghorn Clubmoss
Pancratium maritimum
Sea Daffodil
Pandanus tectorius
Thatch Screwpine
Papaver cambricum
Welsh Poppy
Paphiopedilum callosum
Callus Paphiopedilum
Paphiopedilum hirsutissimum
Parentucellia viscosa
Yellow Bartsia
Parietaria judaica
Pellitory-of-the-wall
Paris quadrifolia
Herb-paris
Parnassia palustris
Grass-of-Parnassus
Pastinaca sativa
Wild Parsnip
Paulownia tomentosa
Foxglove-tree
Pedicularis palustris
Marsh Lousewort
Pedicularis sylvatica
Lousewort
Penstemon sp.
Penstemon
Pentaglottis sempervirens
Green Alkanet